Release Notes: A bug that prevented headers sent by the server (such as
Set-Cookie) that aren't handled internally by the proxy
from being passed onto the client was fixed. A memory
corruption bug due to the wrong amount of memory
being allocated for mime filtering entries was fixed. A bug
that prevented the proxy from using a forwarding proxy
with no ICP type was fixed. A port range option was
added to profile entries. Detection of content encoding
was fixed to handle servers that return multiple types.

Release Notes: Support for ICP (Internet cache protocol) was
added, making it possible to arrange several
proxies in a hierarchy and share cached objects.
It is now possible to specify multiple
directories for cached objects to be stored. The
'Host' and 'File' options in most configuration
sections were removed in favor of enabling/
disable profiles based on the URL requested. A
workaround was added for a bug triggered by
improper headers sent by Apache 1.3 when a
tar.gz file was requested by a client that
doesn't support gzip compression.

Release Notes: A new feature was added that allows profiles to be added or removed from the current request based on the URL. This makes it much easier to enable or disable groups of entries in other sections together for certain sites.

Release Notes: A journal is now kept of all changes made to the
cache, eliminating the need to scan the
directory structure on startup. Some issues with
caching on non-Linux systems were fixed. A new
option was added to indicate to Web sites that
it's acceptable to compress the content, which
is buffered and decompresssed if the client
doesn't support it. The proxy can now serve it's
own proxy.pac file to easily configure browsers.

Release Notes: A new prefetching feature was added, which allows content such as images to be downloaded in the background in anticipation that the Web browser will soon request it. Support was added for deflate encoding, and support for gzip encoding was improved.